The invention discloses a five-piece optical lens for capturing image and a five-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the five lens elements is aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.
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2. The optical image capturing system of claim 1, wherein half of a maximum angle of view of the optical image capturing system is denoted as HAF, and a condition as follows is satisfied: 0 deg<HAF≤50 deg.
3. The optical image capturing system of claim 1, wherein the second lens, the third lens, the fourth lens, and the fifth lens are made of plastic materials.
The optical image capturing system is designed for compact imaging devices, addressing the need for high-performance lenses that are lightweight and cost-effective. The system includes multiple lenses arranged to capture clear images while minimizing size and weight. Specifically, the second, third, fourth, and fifth lenses in the sequence are manufactured using plastic materials. Plastic lenses offer advantages such as reduced production costs, easier mass manufacturing, and lighter weight compared to glass lenses, making them ideal for portable devices like smartphones and cameras. The use of plastic for these particular lenses ensures the system remains affordable and scalable without compromising optical quality. The lenses are designed to work together to correct aberrations, enhance sharpness, and improve overall image clarity. The plastic lenses are engineered to meet specific refractive indices and dispersion properties to maintain optical performance while leveraging the benefits of plastic materials. This design choice supports the system's goal of delivering high-quality imaging in a compact and economical form factor.
4. The optical image capturing system of claim 1, wherein a central thickness of the first lens is denoted as TP1, and a condition as follows is satisfied: 0.5 mm≤TP1≤0.9 mm.
5. The optical image capturing system of claim 1, wherein a horizontal distance parallel to the optical axis between a coordinate point at ½ HEP height on the object-side surface of the first lens to the image plane is denoted as ETL, a horizontal distance parallel to the optical axis between a coordinate point at ½ HEP height on the object-side surface of the first lens to a coordinate point at ½ HEP height on the image-side surface of the fifth lens is denoted as EIN, and a condition as follows is satisfied: 0.2≤EIN/ETL<1.
6. The optical image capturing system of claim 5, wherein thicknesses at ½ HEP height and parallel to the optical axis of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are denoted as ETP1, ETP2, ETP3, ETP4 and ETP5 respectively, a sum of the ETP1 to ETP5 described above is denoted as SETP, and a condition as follows is satisfied: 0.2≤SETP/EIN<1.
7. The optical image capturing system of claim 1, wherein modulation transfer rates (values of MTF) for the visible light at a spatial frequency of 110 cycles/mm at positions of the optical axis, 0.3 HOI and 0.7 HOI on the image plane are denoted as MTFQ0, MTFQ3 and MTFQ7 respectively, and conditions as follows are satisfied: MTFQ0≥0.2, MTFQ3≥0.01, and MTFQ7≥0.01.
8. The optical image capturing system of claim 1, further comprising an aperture, wherein a distance from the aperture to the image plane on the optical axis is defined as InS, and a condition as follows is satisfied: 0.2≤InS/HOS≤1.1.
10. The optical image capturing system of claim 9, wherein half of a maximum angle of view of the optical image capturing system is denoted as HAF, and a condition as follows is satisfied: 0 deg<HAF≤50 deg.
The optical image capturing system is designed for capturing images with a wide field of view, addressing the need for compact imaging solutions with high angular coverage. The system includes multiple lenses arranged to form an image on a sensor, where the lenses are configured to minimize aberrations while maintaining a wide angle of view. The system satisfies the condition that half of the maximum angle of view (HAF) is greater than 0 degrees and less than or equal to 50 degrees, ensuring a balance between image quality and field coverage. This configuration allows the system to capture expansive scenes without excessive distortion or optical errors, making it suitable for applications such as surveillance, automotive imaging, or portable devices where space constraints are critical. The lenses are arranged to optimize light transmission and focus accuracy, with specific curvatures and materials selected to reduce chromatic aberration and spherical aberration. The system may also include an aperture stop to control light entry and improve depth of field. The overall design ensures high-resolution imaging across the entire field of view while maintaining a compact form factor.
11. The optical image capturing system of claim 9, wherein central thicknesses of the first lens and the third lens are denoted as TP1 and TP3 respectively, and a condition as follows is satisfied: TP1>TP3.
12. The optical image capturing system of claim 9, wherein a distance between the third lens and the fourth lens on the optical axis is denoted as IN34, and a condition as follows is satisfied: 0.5 mm≤IN34≤0.7 mm.
This invention relates to an optical image capturing system, specifically a compact lens system designed for portable electronic devices such as smartphones or tablets. The system addresses the challenge of achieving high image quality in a limited space while maintaining a thin profile. The system includes multiple lenses arranged along an optical axis, with specific design constraints to optimize performance. The system features at least four lenses, including a third lens and a fourth lens positioned sequentially along the optical axis. The distance between these two lenses, denoted as IN34, is critically controlled to balance optical performance and physical compactness. The invention specifies that IN34 must fall within a precise range of 0.5 mm to 0.7 mm. This constraint ensures proper light convergence and minimizes aberrations while keeping the overall thickness of the lens assembly within practical limits for portable devices. The system may also incorporate additional lenses and optical elements, such as an aperture stop, to further refine image quality. The lenses are designed with specific curvatures and materials to correct chromatic and spherical aberrations, enhancing sharpness and color accuracy. The overall design aims to provide a high-resolution imaging solution that fits within the tight spatial constraints of modern mobile devices.
13. The optical image capturing system of claim 9, wherein a distance between the third lens and the fourth lens on the optical axis is denoted as IN34, a distance between the fourth lens and the fifth lens on the optical axis is denoted as IN45, and a condition as follows is satisfied: IN34>IN45.
The optical image capturing system is designed for compact imaging devices, addressing the challenge of achieving high optical performance in limited space. The system includes multiple lenses arranged along an optical axis to form an image on a sensor. Specifically, the system comprises at least five lenses, including a third lens, a fourth lens, and a fifth lens, each contributing to the overall optical properties. The spacing between these lenses is critical to performance. The distance between the third and fourth lenses (IN34) is greater than the distance between the fourth and fifth lenses (IN45). This configuration optimizes light convergence and minimizes aberrations, improving image sharpness and clarity. The system may also include additional lenses with specific curvatures and materials to further enhance optical quality. The arrangement ensures compatibility with small-form-factor devices while maintaining high-resolution imaging capabilities. The spacing condition (IN34 > IN45) helps balance lens positioning, reducing bulk and improving manufacturability. The system is suitable for applications requiring compact, high-performance optics, such as smartphones, surveillance cameras, and portable imaging devices.
14. The optical image capturing system of claim 9, wherein the optical image capturing system satisfies a condition as follows: f2>f3.
15. The optical image capturing system of claim 9, wherein a horizontal distance in parallel with the optical axis from a coordinate point on the image-side surface of the fifth lens at the height of ½ HEP to the image plane is denoted as EBL, a horizontal distance in parallel with the optical axis from the intersection point of the optical axis and the image-side surface of the fifth lens to the image plane is denoted as BL, and a condition as follows is satisfied: 0.2≤EBL/BL<1.1.
16. The optical image capturing system of claim 9, wherein the optical image capturing system comprises a light filtering element, the light filtering element being is located between the fifth lens and the image plane, a distance in parallel with the optical axis from a coordinate point on the image-side surface of the fifth lens at height of ½ HEP to the light filtering element is denoted as EIR, a distance in parallel with the optical axis from an intersection point of the optical axis and the image-side surface of the fifth lens to the light filtering element is denoted as PIR, and a condition as follows is satisfied: 0.1≤EIR/PIR<1.0.
17. The optical image capturing system of claim 9, wherein the optical image capturing system has a maximum image height HOI on the image plane perpendicular to the optical axis, modulation transfer rates (values of MTF) for the visible light at a spatial frequency of 220 cycles/mm at positions of the optical axis, 0.3 HOI and 0.7 HOI on the image plane are denoted as MTFH0, MTFH3 and MTFH7 respectively, and conditions as follows are satisfied: MTFH0≥0.2, MTFH3≥0.01, and MTFH7≥0.01.
The optical image capturing system is designed for high-resolution imaging, particularly in the visible light spectrum. The system addresses the challenge of maintaining image quality across the entire field of view, ensuring sharpness and clarity from the center to the edges of the captured image. The system includes an image plane perpendicular to the optical axis, where the maximum image height is denoted as HOI. To quantify performance, modulation transfer rates (MTF values) are measured at specific spatial frequencies and positions on the image plane. At a spatial frequency of 220 cycles/mm, the MTF values at the optical axis (MTFH0), 30% of the maximum image height (MTFH3), and 70% of the maximum image height (MTFH7) must meet or exceed specific thresholds. The system ensures that MTFH0 is at least 0.2, while MTFH3 and MTFH7 are each at least 0.01. These conditions guarantee that the optical system delivers sufficient resolution and contrast not only at the center but also near the edges of the image, improving overall image quality and reducing distortion. The design is particularly useful in applications requiring high-definition imaging, such as digital cameras, smartphones, and other optical devices.
18. The optical image capturing system of claim 9, wherein at least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens may be set as a light filtering element capable of filtering wavelengths less than 500 nm.
20. The optical image capturing system of claim 19, wherein half of a maximum angle of view of the optical image capturing system is denoted as HAF, and a condition as follows is satisfied: 0 deg<HAF≤50 deg.
21. The optical image capturing system of claim 19, wherein a distance on the optical axis between a center of the light admitting opening and a center of the first lens on the object side is denoted as d, and a condition as follows is satisfied: d≤1 mm.
22. The optical image capturing system of claim 19, wherein the first lens has a refractive index denoted as Nd1, and a condition as follows is satisfied: 1.70≤Nd1≤3.0.
The optical image capturing system is designed for high-performance imaging applications, particularly in compact devices such as smartphones or digital cameras. A key challenge in such systems is achieving high image quality while maintaining a small form factor, which requires precise control over lens properties to minimize aberrations and enhance resolution. This system addresses these challenges by incorporating a first lens with a refractive index (Nd1) that falls within a specific range to optimize light refraction and reduce optical distortions. The refractive index of the first lens is defined by the condition 1.70 ≤ Nd1 ≤ 3.0, ensuring the lens material balances light bending efficiency and material feasibility. This range helps achieve a desired balance between reducing spherical and chromatic aberrations while maintaining manufacturability. The system may also include additional lenses with specific optical properties, such as focal lengths, curvatures, and thicknesses, to further enhance image quality. By carefully selecting the refractive index of the first lens, the system improves overall optical performance, enabling sharper, clearer images in compact imaging devices.
23. The optical image capturing system of claim 19, wherein a central thickness of the first lens is denoted as TP1, and a condition as follows is satisfied: 0.5 mm≤TP1≤0.9 mm.
The optical image capturing system is designed for compact imaging devices, addressing the challenge of achieving high optical performance in a small form factor. The system includes multiple lenses, including a first lens positioned closest to the object side. The first lens has a central thickness (TP1) that is optimized to balance structural integrity and space efficiency. The central thickness of the first lens is constrained between 0.5 mm and 0.9 mm, ensuring sufficient rigidity while minimizing overall system size. This thickness range supports precise lens fabrication and assembly, reducing optical aberrations and maintaining image quality. The system may also incorporate additional lenses with specific curvature profiles and materials to further enhance performance, such as reducing chromatic aberration and improving light transmission. The design is particularly suited for applications requiring compact, high-resolution imaging, such as smartphones, wearable devices, and surveillance cameras. The thickness constraint ensures the first lens contributes to a robust yet slim optical assembly, addressing the need for miniaturization without compromising image clarity.
24. The optical image capturing system of claim 19, further comprising an aperture, an image sensing device, and a driving module, wherein the image sensing device is configured at the image plane, a distance from the aperture to the image plane on the optical axis is denoted as InS, the driving module may be coupled with the five lenses so as to displace the five lenses, and a condition as follows is satisfied: 0.2≤InS/HOS≤1.1.
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April 6, 2020
October 25, 2022
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